... 2'-Bipyridine]-4,4'-dicarboxylic acid, dimethyl ester; 2,2'-Bipyridinyl-4,4'-dicarboxylic acid dimethyl ester; 4,4'-Bis(methoxycarbonly)-2 ... 4'-dicarboxylate; [2,2'-bipyridine]-4,4'-dicarboxylic acid, dimethyl ester; 4,4'-bis(methoxycarbonly)-2,2'-bipyridine; 2 ... -2-pyridinyl)-4-pyridinecarboxylic acid methyl ester. 2,2'-Bipyridinyl-4,4'-dicarboxylic acid dimethyl ester is one of bidentate ...